112 pages (PDF version). File size: 848.634 KB. The plan describes proposed monitoring and research activities to be conducted by the U.S. Geological Survey’s (USGS) Grand Canyon Monitoring and Research Center (GCMRC), if the Secretary of the...

This title contains one or more publications. The reports provide more detailed information on the plant conservation research and studies done at the Tucson Plant Materials Center (one of 27 centers established under the program in the United...

205 pages (PDF version). File size: 4920 KB "The objectives of this research project were to: 1. develop a research work plan to conduct a statistically valid study for the development of numerical warrants for left turn
movements, and 2. prepare...